Jaw crusher



Sept. 4, 1951 ||.v sHELToN JAW CRUSHER Filed Oct. 8. 1947 i NVEN T OR HARRY J. SHELTQN ATTOR EY Patented Sept. 4, 1951 UNITED STATES PATENT OFFICE 3 Claims.

This invention relates in general to jaw crushers and, more particularly, to jaw crushers provided with a hydraulic shim jack.

Heretofore, jaw crushers generally comprised a xed jaw and a rocking jaw which is fulcrumed upon a toggle block. In order to vary the de-= gree of flneness of the material crushed, it was necessary to adjust the rocking jaw and toggle block in relation to the stationary jaw, and there= by vary the discharge opening between the lower extremities of the jaws. This adjustment is ordinarily accomplished by shutting down the crusher, releasing a number of bolts and spring rods, and, with chains or similar accessories, pulling the rocking jaw o ut of the way to permit shifting the toggle block forward and inserting or remov= ing shims behind the toggle block. As is well understood by all mechanics and operators who have made such adjustments, the operation is costly, time-consuming, inconvenient, and frequently dangerous. y

The primary object of the present invention is to provide a jaw Crusher having externally operated means for adjusting the discharge opening between the jaws which is simple, speedy, convenient, economical and safe.

It is a further object of the present invention to provide a jaw Crusher having power driven jaw adjustment mechanism which,' if necessary or desirable, can be operated without shutting down the crusher.

Another object of this invention is to provide a jaw crusher havingv ahydraulic shim jack to permit the insertion of shims with the minimum of manual effort in an effective and economical manner.

With the above and other objects in view, my invention resides in the novel features of form, construction, arrangement, and combination of parts presently described and pointed out in the claims.

In the accompanying drawing- Figure l is a vertical sectional view of a jaw crusher constructed in accordance with and embodying the present invention;

Figure 2 is a fragmentary side view of the jaw crusher partly broken away to illustrate in more detail the hydraulic shim jack forming a part of the present invention;

Figure 3 is a transverse sectional view along line 33 of Figure 2; and

Figure 4 is a vertical sectional view taken along line 4-4 of Figure 2.

Referring now in more detail, and by reference characters to the drawing, which illustrates an improved embodiment of the present invention, A designates a jaw crusher including a frame or housing B having spaced parallel side walls I, a stationary front jaw 2, a rockable rear jaw 3 operably mounted at its upper end upon an eccentric 4. Adjacent its lower end, the rear jaw 3 is rcckably fulcrumed upon a toggle plate 5 which is, in turn, fulcrumed in a toggle block l5, the latter being at its ends slidably mounted and clamped in adjustment ways or guides 1, 'I'. Welded or otherwise secured at its end upon the inner faces of the side walls, and extending transversely across the interior of the housing B, is a rigid back plate 8 and removably interposed between the forwardly presented face of the plate 8 and the rear face of the toggle block 6 is a plurality of shims 9, which are vertically supported from beneath by shim brackets 9': Hingedly mounted on the lower extremities of the rear jaw 3 are spring rods I0 extending loosely through the plate 8 and provided on their extended ends with spiral springs II and take-up nuts I2. The side walls I are provided, in the region of the back plate 8, with aligned rectangular apertures I3, through which shims 9 may be inserted and removed, as may best be seen in Figure 3.

Mounted by brackets I4 on the exterior faces of each of said side walls I, forward of the aper ture I3, are hydraulic jack-cylinders I5, connected by suitable tubing I E to a manual oil pump I'I, of the conventional type, preferably mounted in an accessible location on the rear frame B. The pump I'I is provided with a pivotally mount-= ed handle h, a cylinder I8, a piston I8', a needle-= type stop valve I9, a check valve I9', a sump or oil reservoir 2D, and a lling cap 2|, all as best seen vin Figure 4. From a two-way tting 22 mounted on the outlet side of the check valve I 9', the tubing I6 leads to each of the hydraulic jackcylinders I5 and is connected thereunto by suitable ttings 23 mounted in a top plate 24 which is welded or otherwise integrally connected with the bracket l4. Fitted for longitudinal sliding movement within each j ack-cylinder I5 is a piston 25, having an oil seal cup 23 secured upon its inner end by a screw 2l. Uniformly spaced along the length of said piston 25 arey annular grooves 28 for facilitating the hydraulic movement and actuation of the piston 25. The lower projecting end of the piston 25 is integrally provided with a crosshead 29 for receiving the threaded ends 30 of pull-rods 3 I, which are held adjustably therein by retaining nuts 32, lock-washers 33, and locknuts 34.

The upper ends of each of the pull-rods 3l are bent circularly in the provision of eyes 35, for receiving bolts 36 which are threaded into reinforced end sections 3l of a rigid cross bar 38, which extends across the frame B and projects at its endsl through the rectangular apertures I3 and rests along its lower edge on the shim brackets 9'. Said cross bar 38 abuts along its forwardly presented face against the rear face of the toggle block 6.

It will, of course, be understood that the different metal shims 9 may be of diierent thicknesses as required to provide any desired spacial relationship between the toggle block 6 and the back plate 8. The shims 9, furthermore, are equal in length to the distance between the inner opposed faces of the side walls l.

In use, the spacial relation between the jaws of the Crusher may be readily adjusted by closing the needle-type stop valve I9, of the oil pump I1. Thereupon, the pump handle h is actuated to: pump. oil through the tubing I8 into thecylintders' I5. The `incoming oil will exercise a driv- `:ingfforce on the Yhead of the piston 25, causing *said-.piston 25 to Ymove in a downward or outward direction. In the said downward or outvwardrriovernent of the piston 25, the cross bar 'zsis pulled forwardly toward the forward side -of-therectangular apertures I3. The piston 25 `;is,1so moved by continued pumping of the oil .untiltsuiilcient vclearance is `achieved to permit "the facile :insertion or removal of shimsS, as may beirequired. Upon the insertion of the desired 'number of shims 9, the needle-type lstop valve II9 :is opened permitting the oil in the cylinder s25to :flow :backinto the oil-containing sump s lof thenoilrpump Il. Thereupon, the piston 25 will begforced upwardly under the weightof the jaw '3 .back into the cylinder I5 and the cross ,bar 38 will move into abutment against the in- ?.sertedshims 9, completing the adjustment. It is *to be particularly noted that this adjustment can be made while the jaw crusher is idling, and that it :is not necessary to shut the Crusher down.

,In-the event the oil pump I'I should fail or not iunction properly, the threaded ends 30 of the pull-rods'SL retaining nuts 32, and lock- :nuts lprovide "an .auxiliary method of moving -the .cross bar 38. :Said nuts 32 and 34, upon beingk threaded upwardly on the pull-rods 3l, will causethe cross vbar 38 to be moved in the `provision .of clearance for releasing and permitting .removal or insertion of shims 9. It should also benoted .in this connection that a motor driven `hydraulic pump may, if desired, be substituted :forl the manually operable oil pump I'I.

It Ashould be understood that changes and inodications in the form, construction, arrangement, and combination of the several parts .of the jaw Crusher may be made and substituted forthose herein shown and described, without .departing from the nature and principle of my Y. invention.

Having thus described my invention, what .I claim Aand desire to secure by Letters Patent is 1. `A jaw `crusher having a, housing, a movable Jaw, a toggle plate for rockably supporting the lower end of said jaw, a toggle block for rockably supporting the toggle plate, a back support in -said housing, a plurality of removable shims disposed between the toggle block and back support for adjusting the position of the toggle block in relation to the back support, bracket means within the housing for supporting the shims, said housing being provided with openings adjacent the end of the shims for permitting ready insertion and removal thereof, a cross bar interposed between the block and the shims extending at its ends outwardly through the openings, hydraulic jacks operably connected to the ends of the cross ban-'and a fluid pump actuating said jacks, said pump having a fluid reservoir and a return valve associated therewith to control the returned flow of the fluid from the jacks.

2. A jaw Crusher having a stationary jaw, a movable jaw, a toggle plate, a shiftably mounted toggle block, a cross bar disposed abuttingly .against the toggle block and extending at its ends outwardly on opposite sides of the toggle block, hydraulic jacks mounted on opposite sides of the housing forwardly of the openings, each being operably connected to one end of the cross bar, and-a fluid pump. connected by suitable tubing to the jacks for actuation thereof, said pump Ahaving a iiuid reservoir. anda return valve aassocia-ted therewith toucontrol the return :dow of thefluid from the jacks.

3. A `jaw crusher Y,having'a housing, a movable jaa/a toggle 'plate for rockably supporting the lower end of` said jaw, `a toggle block for rockably supporting the toggle plate, a back rsupport insaid housing,'a.plurality of removable shims disposed betweenthe toggle block and back support for adjusting vvthe position of thetoggle block. in relationto the back support, Vbracket means within the `housing for supporting the shims, said housingbeing provided with openings adjacent the'end `of the shims for permitting ready insertiony and Yremoval thereof,'a cross bar interposed .between the block and the shimsextending at 'its ends outwardly through the openings, hydraulic jacks rigidly mounted upon the side walls of the housing, each of said jacksfurther being mountedon the opposite side -of the crossbar with .respect to the shims, said jacks respectively being operably connected to the ends of the cross bar, and a Afluid pump Aactuating vsaid j.ackssaid pump having a lfluid reservoir Yand a return valve associated therewith to control Athe returnedjlow `oi the iluid from the jacks.

HARRY J. SHELTON.

B,EIPERENGES CITED The following'. referencesare of record `in the UNITED S'I'IFES PATENTS Number Name .Date

`120,784 Smith Nov. 7, 1871 v160,682 Johnson Mar. 9,. 1875 423,282 Smith. Mar. 11, 1890 1,468,759 Stockman Sept. 24, 1923 1,545,248 Garretson July '7,1925 1,575,539 Butterworth Mar, 2,1926 1,954,288 Francis Apr. 101934 1,972,930 Green Sept. 11 1934 2,291,910 Malone Aug. 4, 1942 2,326,215 Gruender. .Aug. 10,1943 2,374,046 Stacom Apr. .17, 1945 2,440,388 Wright Apr.27,..1948 

